// 具体实现
public class VectorRenderer implements Renderer{
    @Override
    public void renderCircle(float radius) {
        System.out.println("矢量渲染圆形，半径：" + radius);
    }

    @Override
    public void renderSquare(float side) {
        System.out.println("矢量渲染方形，边长：" + side);
    }
}
